There are a lot of dynamics that point to a lower-scoring game than the total posted:
The teams last played on Monday. Possible rust. 
Russell Westbrook will make his series debut. This will be just his second game since Aug. 4. Possible rust.
Focus could be an issue following the team's boycotting Wednesday's game in order to bring attention to social justice and racial inequality issues. Chris Paul was instrumental in those boycott talks. 
The series is tied 2-2 so this is a pivotal game. 
The Rockets live-and-die by the 3-pointer. No team fires up more shots from beyond the arc than Houston. Oklahoma City, though, finished third in 3-point percentage defense. Ace defensive rookie Lugentz Dort is healthy again for the Thunder. He's been a problem for James Harden, who has missed 28 of 39 3-point shots during the last three games.